4 ms·
What is the benefit of crossing the ocean? The lands on both sides are comparable.
by dvh 1y ago
What is the benefit of crossing the ocean? The lands on both sides are comparable.
- pjc50 1y agoFollowing the seasons, suggests the article. Insects are pretty temperature sensitive.
- olalonde 1y agoSeasons change primarily North–South, not East–West, right? I think the question is why don't they just go from North American to South America instead of crossing the ocean?
- yxhuvud 1y agoIf we go by the article, because there is water between Norway and Denmark. They could cross further south in southern Sweden, but that'd mean they'd have to go around. The Americas is not part of the equation.
- pjc50 1y ago> Just like birds, some species of hoverfly migrate with the seasons. They move to southern Spain in the early autumn and then as far north as Norway in spring (the northern leg is less well understood, and seems to take place over several generations, since each fly only actually lives for a few weeks). No Americas involved.
- deleted 1y ago[deleted]
- deleted 1y ago[deleted]
- arethuza 1y agoPerhaps they were doing it before the Atlantic opened up and they just kept going...